Murdered teen Hassan-Kul Hawadleh died of a single stab wound to the heart, coroners have revealed.
The 19-year-old collapsed and died after being knifed in the forecourt of High Weald Service Station, in High Road, Harrow Weald, last Thursday night.
An inquest was opened and adjourned at Hornsey Coroners' Court this morning.
Murder squad detectives have arrested a 20-year-old man who has been bailed to return.
For more on this story see this week's Observer, out tomorrow.